The derivative of y = 2 ^ xcosx-3xlog2009x y = (x + cosx) / (x-cosx) y = the derivative of COS ^ 2 (2x + π / 3) Just x on the index, 2009x

The derivative of y = 2 ^ xcosx-3xlog2009x y = (x + cosx) / (x-cosx) y = the derivative of COS ^ 2 (2x + π / 3) Just x on the index, 2009x

The second is: (- 2xsinx-2cosx) / (x-cosx) ^ 2
The third is: - 2cosxsinx (2x + π / 3) + 2cosx ^ 2
Is xcosx in the first index? Is 2009x real or only 2009